SPARC Parameters

TDR value operational value
Electron Beam Energy (MeV)
155
...
Bunch charge (nC)
1.1
...
Repetition rate (Hz)
1-10
...
Cathode peak field (MV/m)
120
...
Peak solenoid field @ 0.19 m (T)
0.273
...
Photocathode spot size (mm, hard edge radius)
1.13
...
Central RF launch phase (RF deg)
33
...
Laser pulse duration, flat top (ps)
10
...
Laser pulse rise time (ps) 10% --> 90%
1
...
Bunch energy @ gun exit (MeV)
5.6
...
Bunch peak current @ linac exit (A) (50% beam fraction)
100
...
Rms normalized transverse emittance @ linac exit (mm-mrad);
includes thermal comp. (0.3)
<2
...
Rms slice norm. emittance (300 um slice)
<1
...
Rms longitudinal emittance (deg.keV)
1000
...
Rms total correlated energy spread (%)
0.2
...
Rms incorrelated energy spread (%)
0.06
...
Rms beam spot size @ linac exit (mm)
0.4
...
Rms bunch length @ linac exit (mm)
1
...